Surface Roughness Testing

SGS MSi performs surface roughness on linear surfaces. Our equipment can provide the characteristics of a material’s surface variation per a given standard and specification.

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Sample/Testing Description

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Surface Roughness is a measurement of vertical deviations on the surface of a sample in its ideal form. Depending on the size of these deviations the surface will either be rough or smooth. A very rough surface will interact differently with other materials due to the coefficient of friction. This may be undesirable when a contact between two parts must be smooth. However, manufacturing a very fine surface is more costly. The application of the parts and their interactions to surface condition will ultimately determine the desirable surface roughness.

The profilometer is a tool designed to measure the deviations in surface texture. A diamond tipped stylus runs over the surface of the material reacting with variations in surface texture. When a variation is measured high or low, the profilometer reports the variant data. After scanning, the surface will be given a rating in roughness per the specification requested.